I realize that the Slayer is not for asphalt but that is where I drive so my Slayer had to be changed as it spent more time on its lid than the tires! The following are some of the changes:
Rear Springs to front.
New "pink" springs at the rear.
Anti-sway bars front and rear.
1 inch axle extensions with 12mm hex.
2.8 Anacondas all round.
Dual steering servos.
I'm still tuning but it doesn't roll and steers direct. The roll cage is from a TMaxx but bent to fit with a vice and vice grips. The body fits in the same location so it looks the same. The wider stance does not look "odd" and the truck looks a little more "open wheel" but not like my Jato. The Anacondas put more rubber on the road but I still have the ride height.
I also ran it with 2.2 Road Hawgs which, I must admit, looks a little weird but it changes the final drive ratio and gives plenty of grip. It was because of this mode that I bought the second steering servo.
I am a firm believer in that a truck cannot be set up for dirt and road and after these mods the dirt performance is compramised but if you are only on the road then this info may help.